Migrating Your Existing Backup Data; Configuration And Reporting; Required Deduplication Licenses By Platform - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

There are three licenses available, one for each VLS platform – VLS6000–series, VLS9000–series,
and VLS12000 Gateway. See
Table 24 Required Deduplication Licenses by Platform
Platform
VLS6000–series
VLS9000–series 7.5 and 10 TB systems
VLS9000–series
VLS12000–series Gateway
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The VLS9000 7.5 TB system does not require a license for a third expansion kit because the first two expansion kit licenses
cover the storage provided by the third kit.

Migrating your Existing Backup Data

If you are enabling deduplication on an already active VLS, the following process can be used to
retain your existing backup data (stored before deduplication was enabled) and gradually overwrite
it with new backups that will then be deduplicated. This is because deduplication only works on
backups that are stored after deduplication was enabled.
After you enable deduplication on your VLS and perform all the preparation steps:
1. Perform your normal backups.
2. Wait one data retention cycle for all the existing virtual cartridges to be expired by the backup
application and then rewritten with new backup data. If there are cartridges that would not
normally expire, you may need to manually expire them to force them to be reused. At the
beginning of the next retention cycle, all of your old backup data should have been overwritten
with new backup data that has been deduplicated (freeing up disk space).
3. Once all the existing virtual cartridges have been rewritten and deduplicated, you can extend
your retention policy for your backup jobs to take advantage of the deduplication.

Configuration and Reporting

Accelerated deduplication is aware of the backup contents of tapes. Therefore, you have reporting
and policy control options available over the deduplication process. You can:
• Enable and disable deduplication by backup job type or individual backup job.
• Switch from backup to File-level differencing for file server backup jobs.
• View deduplication status and statistics per backup job, by backup job type, or by cartridge.
• View a detailed breakdown of the capacity used by reference data, deduplicated data, data
awaiting deduplication, and metadata.
The deduplication reports show the following states:
Waiting for Next Backup
for a new backup. Incr/diff backups difference against the new full backup, not the old full backup.
Table 24.
Deduplication licenses required
One license per MSA20 for 250 or 500 GB drives
Two licenses per MSA20 for 750 GB drives
Two licenses per MSA20 for 1 TB drives
One license per base unit
One license per expansion kit
Three licenses for 30 TB capacity
Four licenses for 40 TB capacity
One license per 2 TB EVA LUN
the backup has nothing to difference against and is therefore waiting
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